Sponsor
Physics
Condensed Matter Seminar - Designing New Materials and Phenomena from Ab-initio Approaches
Thursday, May 7,
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Speaker(s): Laurent Bellaiche
The aim of this Talk is to report some predictions in a variety of materials and arising from the use of first-principle and first
principle-based numerical approaches.
More precisely, four different topics will be discussed in detail, if time allows:
- 1) a design of multifunctional materials having several optimized physical properties, including strong piezoelectricity, large
electro-optic conversion, as well as ultrahigh energy density and efficiency [1,2].
- 2) a proposed way to induce the elusive quantum spin liquid state in 2D magnets [3,4].
- 3) the predictions that complex ferroelectric bulks and nanostructures can exhibit a variety of so-called hidden states (i.e., states
that are not accessible via the tuning of thermodynamic variables, such as temperature or pressure) with enhanced properties, and
are promising for ultrafast neuromorphic computing, when applying THz pulses of electric fields [5,6].
- 4) the occurrence of unusual phenomena when twisted light is applied to ferroelectrics [7,8].
References:
[1] Z. Jiang et al, Phys. Rev. Lett. 123, 096801 (2019).
[2] Z. Jiang et al, Phys. Rev. Mater. 5, L072401 (2021).
[3] C. Xu et al, npj Comp. Mat. 4, 57 (2018).
[4] C. Xu et al, Phys. Rev. Lett. 124, 087205 (2020).
[5] S. Prosandeev et al., Phys. Rev. Lett. 126, 027602 (2021).
principle-based numerical approaches.
More precisely, four different topics will be discussed in detail, if time allows:
- 1) a design of multifunctional materials having several optimized physical properties, including strong piezoelectricity, large
electro-optic conversion, as well as ultrahigh energy density and efficiency [1,2].
- 2) a proposed way to induce the elusive quantum spin liquid state in 2D magnets [3,4].
- 3) the predictions that complex ferroelectric bulks and nanostructures can exhibit a variety of so-called hidden states (i.e., states
that are not accessible via the tuning of thermodynamic variables, such as temperature or pressure) with enhanced properties, and
are promising for ultrafast neuromorphic computing, when applying THz pulses of electric fields [5,6].
- 4) the occurrence of unusual phenomena when twisted light is applied to ferroelectrics [7,8].
References:
[1] Z. Jiang et al, Phys. Rev. Lett. 123, 096801 (2019).
[2] Z. Jiang et al, Phys. Rev. Mater. 5, L072401 (2021).
[3] C. Xu et al, npj Comp. Mat. 4, 57 (2018).
[4] C. Xu et al, Phys. Rev. Lett. 124, 087205 (2020).
[5] S. Prosandeev et al., Phys. Rev. Lett. 126, 027602 (2021).